Professional Gamers Who Use Adderall Will Need Doctor’s Note

People who play electronic games professionally will not be allowed to use the attention deficit hyperactivity disorder drug Adderall unless they have a doctor’s note, the Electronic Sports League (ESL) said Wednesday.

The league announced the full list of drugs that will be banned for gaming competitions, including steroids and cocaine, Time reports.

“As the world’s largest and oldest esports organization, ESL has an ongoing commitment to safeguarding both the integrity of our competitions and that of esports as a whole—we wish to ensure we can provide a fair playing field for all participating players,” Ella McConnell, Senior Editor of ESLGaming, wrote in a statement.

ESL said it is working with the World Anti-Doping Agency to decide which drugs are banned from competitions.

Last month, ESL announced that professional gamers would be tested for performance-enhancing drugs, after a player said he used Adderall to gain an advantage.

“The popularity and visibility of esports has grown exponentially in recent years, but this combined with the increasing size of prize pools has also made the temptation of rule-breaking even greater,” McConnell wrote.